Product Description
MECps
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Product Description
Having a very small footprint of only 2 units (36 mm), the combined KNX system device
MECps640 merges the functionalities of two different system devices. Additional to coupling
two TP lines and providing KNX line coupler functionality, MECps640 has an integrated KNX
Power Supply to generate a 640 mA output. With this choked output, the KNX TP Line that is
connected to MECps640 on secondary side (subline) is powered by a voltage of 30V DC.
MECps640 can be used as a line coupler, area coupler or line repeater.
To provide a bi-directional data connection between two KNX TP lines or areas, MECps640
works as a KNX line/area coupler in the KNX network. KNX TP main line and KNX TP subline
are coupled having a galvanic isolation in between. The choked output is overload-proof and
short circuit protected. Extended frames and long telegrams with up to 240 bytes APDU
length are supported. The LED display indicates states of the device and the bus lines. On
button press, the device can be reset. Also, the subline can be reset on button press.
Using the TP Coupler application, MECps640 can be used as KNX TP line coupler to connect
different TP Lines, Areas and Segments. Telegram filtering is accomplished according to the
installation place in the hierarchy (Physical[ly addressed] Telegrams) and according to the
built in filter tables for group communication (Group [oriented] Telegrams). For detailed
diagnosis, all operational modes/states are shown by a duo-LED display. Programming on
main line from the subline can be suppressed. Telegram repetition on both TP lines can be
reduced.
Using the TP Repeater application, MECps640 is able to extend a KNX TP line providing
unfiltered data transfer and galvanic isolation between segments. Up to four line segments
can form a single KNX TP line by connecting three MECps640 line repeaters.
To ease commissioning and troubleshooting, special routing/repetition/confirmation ETS
settings and a configurable Manual Function for short-time telegram filter switch-off are
available. E.g. “transmit all group telegrams” can be activated by a single button press
. After
the pre-set time period, MECps640 switches back to normal operation automatically. Another
feature to increase the data throughput is the ability to send IACKs on own telegrams.
In this document, individually addressed telegrams are named Physical Telegrams.
In this document, group-oriented telegrams are named Group Telegrams.
